EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 4 - Chemical Bonding and Molecular Structure>AIPMT - 3rd May 2015>Q 33

EASY

NEET

IMPORTANT

Earn 100

The total number of $π$ -bond electrons in the following structure is:

35.71% studentsanswered this correctly

Important Questions on Chemical Bonding and Molecular Structure

EASY

NEET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 4 - Chemical Bonding and Molecular Structure>AIPMT - 25th July 2015>Q 34

The formation of the oxide ion,

O^{2 -} (g)

, from oxygen atom requires first an exothermic and then an endothermic step as shown in below:

O (g) + e^{-} ⟶ O^{-} (g); Δ_{f} H^{⊖} = - 141 k J m o l^{- 1}

O^{-} (g) + e^{-} ⟶ O^{2 -} (g); Δ_{f} H^{⊖} = + 780 k J m o l^{- 1}

Thus process of formation of

O^{2 -}

in gas phase is unfavourable though

O^{2 -}

is isoelectronic with neon. It is due to the fact that,

HARD

NEET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 4 - Chemical Bonding and Molecular Structure>AIPMT - 25th July 2015>Q 35

Decreasing order of stability of $O_{2}, O_{2}^{-}, O_{2}^{+}$ and $O_{2}^{2 -}$ is:

MEDIUM

NEET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 4 - Chemical Bonding and Molecular Structure>AIPMT - 25th July 2015>Q 36

The variation of the boiling points of the hydrogen halides is in the order

H F > H I > H B r > H C l

. Which of the following option explains the higher boiling point of hydrogen fluoride?

MEDIUM

NEET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 4 - Chemical Bonding and Molecular Structure>AIPMT - 25th July 2015>Q 37

In which of the following pairs, both the species are not isostructural?

EASY

NEET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 4 - Chemical Bonding and Molecular Structure>AIPMT - 4th May 2014>Q 38

Which of the following molecules has the maximum dipole moment?

MEDIUM

NEET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 4 - Chemical Bonding and Molecular Structure>AIPMT - 4th May 2014>Q 39

Which one the following species has plane triangular shape?